I can log on, but battlenet doesn't work. Changing servers requires that I log-out complete though and even then I have to wait until the code of my authenticator refreshes. There are definitely some issues atm.

Been having problems for over a week now, random disconnects, 100% load screen stuck, instance DC's or just the game lagging immensely.. Also it's probably a little bit the cause of the stupid Belgian internet ( yep we got AWESOME internet ! /sarcasm off) that makes it even worse to even Google or watch a Youtube video..

You're cutting too much game out to satisfy people who don't like actually playing the game.